Ammeter to Voltmeter...who does it?

Redfish, that's a great solution on the isolating the voltage regulator, however I am tapping my 12V off the gas gage 12v feed stud. Not sure how that still isolates the original IVR unless you pop it apart and at least clip the black wire and bend the points apart so they dont touch. I did forget to mention that extra ground. What I did with my panel was add a grounding stud, and an extra wire that will be attached to the lower LH side of the dash at the mounting screw that holds the dash to the body.